Attachment plug



Jan.. 12 1.9216. y 1,569,013

Ca L.. HOPKINS ET AL.

ATTACHMENT PLUG Filed Jan. l2, 1922 2 Sheets-Sheet l Jan. 12 ,1392s. y www@ Q. L. HOPKINS 5T AL ATTACHMNT PLUG Filed Jan. l2, 1922 2 SheetsShee1l 2 QMW, QM f INU ATTACHMENT PLUG.

Application filed. January i2, 1929.

To all whom t may concern:

Be it known that We, Cerimes L, licenties, zi citizen of the United States, residing et River Forest, in the county oit Cook enti State of Illinois, und CHESTER E. W'ARNER, a citizen of the United States, residing at Berwyn, in the county of Cool; enti State of illinois, lieve invented, certain new end useful improvements in Attachment Plugs, of which the following' is a full, cleer, concise, and exact description, reference being had to the accompanying' drawings, forming a part of this speciticstioi'i. v

Our invention relates to attachment plugs.

Une of the objects of our invention is to provide improved means for facilitating; the insertion and removal oit the plus; with respect to the socket.

A further object oi onsA invention is Ato provide improvements in tlie'construction of attachment plugs.

A further object of our invention is to provide e swivel shell attachment plug with improved means ior facilitating; its use. f

fi further object of our invention is to provide :1 separable swivel shell attachment plug with improved means for facilitating its use. l

A further object of our invention is to provide e separable swivelsliell attachment plug With means Jtor screwing' the swivel shell into the socket, which extend dcwn- Wardiy alongside the cap ci the plug to enable it to be readily grasped.

Further objects will appear from tlie tietailetl description to follow and. from tiie appenclerl claims.

lnA tlie drawing-s in which two embodiments oirour invention are shown-- Figure 1 is a side elevation ot e separable swivel shell attachment plugr embodying our invention;

Fig. 2 is :i vievi from the rightoi Fig'. l, the body part being shown in section;

Fig'. 3 is a bottom plan view of the body part of a plug; K

Fig. 4 is a 'plan view of :t fibre disc form in part of the construction;

ig. 5 is e perspective View showing :i contact sind conductor member;

5 'is e side elevation oi e swivel slieli attachment plug 'embodying our invention: :intl

Fig. is a bottom plan/view of Fig. 6.

Referring now to the drevvings in detail, and first Ato Figs. l to 5 inclusiv@ tile consiroction shown therein comprises e segr riible swivel shell attachment eine: l0, lievingf en extension handle li oivotelly con nected et l2 to the tlircaiietl shell contact to facilitate screwing the plug' into a sockel'Je liv reason of tbeiect that the lionle il is pivotelly mounted with respect to the plug., it will yield when necessery to permit the necessary .movementof the cord 'i3 Without exerting undue sitio bull on the plug", tbe

4position to which the handle il. may be swung being; indicated ifi dotted lines in Fig. l.

This handle il is in time form of Wire loop or bsil pivoteliy mounted et l2 or; the ears lll, which may be 'formed integral with the metal ringe; or terriile l5 secured to 'Lite threaded shell contact i6. ln order to iii.- sulzite the handle 1l from the threaded shell Contact l5,- un insniiitin ring: l?" is provided, the inner edge of which is lielfi. in e eben-tiel .formell in the lower part oi the tlireiitleii shell contact 16 and center contact member Q4 respectively.. The Contact member 22 may be u sheet metal stamping secured on the insulating base 23 by means of tbe center eolitact 2l which may be in the torni oit ev tnbulair eyelet having' its lower portioii embedded in the insulatingY baseq and its upper portion extendingr through :incl flanged over the stamping? iormiigfir the Contact member 22.

The contact members '2l niziv be formeel es part of e sheet metal stomping, bovins* s yoke-shaped portion 25, and zi pziir o'l slidii'rer Contact members 526, which slidzibly engem an' inwardly extending iiiingze on t e threaded shell Contact i6. (Figs. 2, 3 and 5). llhe stmnpilig meybe provided vfitli e pair of upwardly turned lugs C which extend aseaois into correspondingly located recesses in the 'insulating base 23 to position the stamping with respect to the base. The insulating base v23 is suitably recessed to receive the.

contact members 21 and 22, and to permit the entry of the contact blades 20 of the cap 19. f n

In order to hold the threaded shell contact in place, a circular insulatin disc 28 is provided (Figs. 2 and 4) which is secured to' the lower face of the insulating base 23 by means of an eyelet 29 embedded 'pair of positioning openings 32 to receive positioning lugs 33 (Fig. 3). v

In use, the extension handle 11 facilitatesA the insertion of the plu into a socket,

particularly when the soc et is at a con siderable hei ht,.making it difficult to reach with the ordi in a deep shade which would make it hard to reach up into the shade with the ordinary y lu p Bgecause of the hinging of the handle, itfcan readily he swung to oneside if the cord is pulled sidewise against the handle. As the handle does not confine the cord in anyway, as wouldbe the case if 'it were a rigid tubular handle containing 'the cord, it does not cause any undue strain to be exerted onthe plug when the cord is pulled V sidewise. f

In Figs. 6 and 7 we have shown our'invention as applied to an ordinary swivel shell plug 35, the extension handle'36 being connected to the swivel threaded shell 37 by means of a universal joint connection at 38. In this construction, the Wire handle 36 extends.

is pivoted at 39' to a ring 40; which in turn is pivotally connected at 41 to a painof ears bent downwardly from the'ferrule or, p y i 7. An attachment plngI comprising a ring 42 secured to the threaded shell 37.

In order to insulate-the handle 36` and.

the threaded shell contactJ 3 7 an insulating ring may be provided similar to the ring `17 in the 'construction previously described,

the inner edge of this insulating ring being secured to the threaded shell contact `37, the ring 42 being secured t-o the outer edge of thisinsulating ring.

For convenience in manipulation, the lower end of the handle 35 may be formed into a coil 43, through which the-cord 44 This coil 43 serves as a sort of thumbpiece in screwing the threaded shell contact into the socket The universal joint connection permits the handle 43 to swing with the cord 44 no matter in what direc'- tion the cord leads from the plug, and the handle 36 exerts no confining influence on nary plug, or if the socket is' the cord itself, so that no undue strain is exerted on the plug when the cord lis pulled to one side.

Having thus described our invention, i

what .we claim as new and desire to secure vby Letters Patent of the United States is:

1. An attachment plug comprising a threaded shell lcontact, and an extension handle having a universal joint connection With said plug.

2. An attachment plug comprising a 'threaded shell contact, y and an extension handle having a universal joint connection with said threaded shell contact.

3. An attachment 'plug comprising a body portion, a threaded shell contact swiveled -with respect to said body portion, and an extension handle having a universal joint, connection with respect to said swivel shell.

4. An attachment plug comprising a threaded shell contact, and an extension handle having a universal joint connection with respect to said threaded shell contact,

said Auniversal joint connection comprising ,a ring coaxial with said threaded shell contact and pivotally mounted with respect thereto, and a loop handle pivotally.con-

nected with said pivot ring.

5. An attachment plug comprising a body portion, a threaded shell contact swiveled with respect to said body portion, and an extension handle having a universal joint- Vconnection with said swivel shell, said universal joint connection comprising a ring coaxial lwith said threaded shell and pivotally mounted with respect thereto, and. a loop-shape handle pivotally mounted on said ring.

6. A swivel shell plug comprising iin-1nsulating base, a threaded shell contact surrounding and swiveled with respect to said insulating base, an insulating ring secured to said threaded shell contact, a ferrule secured to said insulating ring, -and an ex.- tension .handle pivotallyA secured to said errule. f

threaded shell contact and an extension handle pivotally secured .to saidplug, said extension handlecomprising a wire extending alongside the cord, and having a loop embracing the cord.

8. A separable swivel shell plug comprising an insulating base, a center contact mounted thereon, a threaded shell contact sur-` rounding said base and swiveled with respect thereto, blade-engaging contacts mounted los.

imv

inname" mounted thereonpa threaded shell contact surrounding said base and swiveled .with respect thereto, blade-engaging contacts mounted thereon, and a cap having blades.

extending into one of said recesses, an insulating plate securedfto the lower end ci said base and provided with openings arranged to register with the recesses in said base, a shelly contact rotatably mounted between said base and said insulating plate,

a second blade-engaging contact. mounted between said base and said shell contact and extending into one of said recesses.

11. A swivel attachment plug 'comprising a base, a center contact mounted on ,said base, a blade-engaging contactl electrically connected to said center contact, an insulating plate secured to the lower end of said base and having openings therethrough ar-,

ranged to receive the blades of an attachment plug cap, a shell contact 'rotatably mounted between saidy base and said insuu lating plate, and a second blade-engaging contact mounted between said base and said shell contact and arranged to rictionally en gage said shell contact.

12. A separable swivel shell plug comprising an insulating base, acenter contact and in electrical contact with.v said plug con;-

mounted thereon, a threaded shell contact surroundingsaid base and swiveled with y respect thereto, blade-engaging contacts ar-Jl. ranged to extend into openings in said base and in electrical contact with said plug contacts, and an insulating member on one end ot said base, said threaded shell being held in place by said insulating member, and a loop-shaped handle secured to and insulated from said threaded shell.

13. A separable swivel shell plug comprising an insulating base, acenter contact mounted thereon, a threaded shell contact surrounding said base'V and swiveled with respect thereto, blade-engaging contacts. arranged to extend into openings in said base dit tactsand an insulating member on one end of said base, vsaid theaded shell being held in place by said insulating member, and a loop-shaped pivoted handle secured to and insulated from said threaded shell.

14e A separable attachment plug comprising a body portion and4 a cap portion, said body portion comprising center and Side contacts and lblade-engaging contacts, said. cap portion comprising blades for engaging said blade-engaging contacts, and an extension handle permanently mounted on said plug to move about an axis'transverse to the axis of the plug, said extension handle comprising a bail-shaped member having one arm pivoted on one side of the plug and l the other arm pivoted on the other side of the plug.

In witness subscribed our names.

CHARLES L. HOPKINS. CHESTER E. WARNER,

whereof, .we have hereunto W 

